基于主动网络的分布式P2P网络模型

分布式P2P网络Gnutella模型的对等机共享信息查询的搜索、定位路由协议仅使用"洪泛"算法,因此存在可扩展性问题.同时,由于其协议机制仅在应用层实现,缺乏对Intemet底层通信子网路由资源的利用,存在性能与效率不高的问题.为了解决上述问题,考察了Gnutella网络和Internet网络节点的拓扑分布规律,二者不仅均呈现幂规律(power law)和小世界(small world)特征,而且其幂系数t非常近似.提出了一个基于主动网络技术的分布式P2P网络(active distributed pee

A Distributed P2P Network Model Based on Active Network

Gnutella protocol simply uses flooding algorithm to route peer's querying, so it has the poor scalability problem. For not using down-layer's routing information of Internet, it also has the common problem that its querying routing is just implemented on application layer, and its efficiency is low. The distributions of topology nodes in Gnutella and Internet are reviewed, and they not only exhibit power law and small world properties, but also have the near power-coefficient t. A new distributed peer-to-peer network model based on active network technology (active distributed peer-to-peer network, ADP2PN) is proposed, and its prototype system is implemented. Simulation results about ADP2PN's prototype architecture and querying routing algorithm show that it could effectively resolve the above problems, so the model is reasonable and valid.